SSH version 1 allowed
At a glance
Base severity
Area
Platform
Evidence level
Benchmark reference
Reads the export, not the device
ConfigProof reads a configuration export. This control is evaluated against the objects in that file, and it reports what the file says. It does not connect to the device and sees no traffic, so a finding here describes the configuration, not what the firewall is doing right now.
Why it matters
SSH version 1 has known protocol weaknesses that allow session hijacking and decryption.
How to fix it
Web interface
The steps below are written for the web interface. A finding raised on your own export carries the same steps with your object names filled in.
- Set admin-ssh-v1 disable under config system global.
Command line
FortiOS CLI
config system globalset admin-ssh-v1 disableend
An example. Values in angle brackets are yours to supply; a finding on your own export fills in the names it read. FortiOS saves a change when you type next or end, with no separate commit. Read every line first.
Read it back
show system globalBefore you type it2
- Written from the FortiOS CLI Reference, not yet run on a device. Read each line before typing it.
- On a device with VDOMs, type these inside the VDOM (config vdom, edit the VDOM) or inside config global for a global setting.
How to confirm the fix
- Run show system global and confirm admin-ssh-v1 is disable.
Limits
- A setting the backup does not write is read as FortiOS's documented default for the device's release.
Compliance references
No benchmark recommendation is mapped to this control in this version.
Weak cryptography and protocols
- CRY-MGT-003SSH version 1
More in Administrators and Access
- FGT-SEC-015Default administrator account admin is present
- FGT-SEC-017Administration listens on the default ports
- FGT-SEC-018Administrator idle timeout above 15 minutes
- FGT-SEC-019Administration accepts TLS below 1.2
- FMG-SEC-001FortiManager administrator may log in from any address
- FMG-SEC-002Local FortiManager administrator without a second factor
- FMG-SEC-003HTTP or Telnet administration allowed on a FortiManager interface
- FMG-SEC-004FortiManager administrator sessions stay open more than 15 minutes when idle
See it on your own firewall
One complete analysis of one firewall costs nothing and needs no card.